Home / 5,220.30-7,830.45-1,324.56

Finding the Fourth Proportional to 5,220.30, 7,830.45 and 1,324.56

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Solution

The fourth proportional to 5,220.30, 7,830.45 and 1,324.56 is: 1,986.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.30 : 7,830.45 = 1,324.56 : x
  2. Step 2: Convert to fraction form
    5,220.30/7,830.45 = 1,324.56/x
  3. Step 3: Cross multiply
    5,220.30x = 7,830.45 × 1,324.56
  4. Step 4: Simplify right side
    5,220.30x = 10,371,900.85
  5. Step 5: Solve for x
    x = 10,371,900.85/5,220.30
  6. Step 6: Final answer
    x = 1,986.84

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.